OpenGraph-Image unable to locate static files via process.cwd()

Link to the code that reproduces this issue

https://codesandbox.io/p/devbox/practical-brattain-ghlpgf

To Reproduce

Navigate to https://hypermod-a6gx8i6po-codeshiftcommunity.vercel.app/explore/react-19-remove-forwardref and attempt to read opengraph image (https://www.opengraph.xyz/)
Vercel server will log an error stating that it is unable to access static files

[Error: ENOENT: no such file or directory, open '/var/task/public/images/og/logo.png'] {
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: '/var/task/public/images/og/logo.png'
}

However in development mode this works as expected

Using the repo, it needs to be deployed in order to replicate https://codesandbox.io/p/devbox/practical-brattain-ghlpgf

Current vs. Expected behavior

Current behaviour appears to be that the following code does not work as expected since cwd is not the same in prod/dev environments

const interSemiBold = await readFile(join(process.cwd(), 'assets/Inter-SemiBold.ttf'))

My code is as follows:

import { readFile } from 'node:fs/promises';
import { ImageResponse } from 'next/og';
import { join } from 'node:path';

export const alt = 'Foo';
export const size = { width: 1200, height: 630 };

export const contentType = 'image/png';

// Image generation
export default async function Image({ params }: { params: { slug: string } }) {
  const cwd = process.cwd();
  const font = await readFile(join(cwd, '/assets/fonts/Inter-Bold.ttf'));
  const fontSrc = Uint8Array.from(font).buffer;
  const logoData = await readFile(join(cwd, 'public/images/og/logo.png'));
  const logoSrc = Uint8Array.from(logoData).buffer;

  return new ImageResponse((<div>...<div>),
    {
      ...size
      fonts: [
       {
          name: 'Inter',
          data: fontSrc,
          style: 'normal',
          weight: 500
        }
      ]
    }
  );
}

Provide environment information

Vercel Prod
Next: 14.2.15
App router

Which area(s) are affected? (Select all that apply)

Image (next/image)

Which stage(s) are affected? (Select all that apply)

Vercel (Deployed)

Additional context

No response

Start with the linked CodeSandbox reproduction and the deployed Vercel route, then inspect the App Router image-generation entry point using the shown process.cwd() and readFile calls. Compare development and production asset paths and verify the OpenGraph image can load its font and logo after deployment without the ENOENT error.